Revert "Generate DCL tests to service packages (#8349)"

[modular-magician]

This reverts commit 353dbb9638311cd43b00a4946abdb783b6eff985.

There is a bug in the teamcity when running sweepers. Revert the RP before it is fixed.

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• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
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Derived from GoogleCloudPlatform/magic-modules#8427